Ultrasonic authenticating button

US9945818B2 · kind B2 · utility

Assignee

• QUALCOMM Incorporated · US

Inventors

• Suryaprakash Ganti · Los Altos, US
• Srikanth Chilukuru · San Jose, US
• Livingstone Song · San Diego, US
• Kostadin Dimitrov Djordjev · Los Gatos, US
• Jack C. Kitchens · Tonawanda, US
• John K. Schneider · Williamsville, US
• Nicholas Ian Buchan · San Jose, US
• Leonard Eugene Fennell · San Jose, US
• Hrishikesh Vijaykumar Panchawagh · Rochester, US
• Ashish Hinger · Sunnyvale, US
• Nai-Kuei Kuo · San Jose, US
• Kollengode Narayanan · Cupertino, US
• Samir Kumar Gupta · San Diego, US
• Timothy Dickinson · Crystal Lake, US
• Max Hamel · Poway, US
• David William Burns · Minneapolis, US
• Muhammed Ibrahim Sezan · Camas, US
• Eugene Dantsker · San Diego, US

Key dates

• Filing date: Feb 20, 2015
• Grant date: Apr 17, 2018
• Expiry date: Feb 16, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2291/018
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Embodiments of an ultrasonic button and methods for using the ultrasonic button are disclosed. In one embodiment, an ultrasonic button may include an ultrasonic transmitter configured to transmit an ultrasonic wave, a piezoelectric receiver layer configured to receive a reflected wave of the ultrasonic wave, a platen layer configured to protect the ultrasonic transmitter and the piezoelectric receiver layer, a first matching layer configured to match an acoustic impedance of the platen layer with an acoustic impedance of ridges of a finger, and an ultrasonic sensor array configured to detect the finger using the reflected wave.